wah!! my contractor not yet start work so i not dare to recommend u 1 but his price not the cheapest cos he charge 2.50 but his service is good.....i ask him to come see my unit for more than 4 times without paying deposit and until now he oso not yet start work cos have to wait my kitchen renovation....
he only do plaster ceiling so he got wiring fren and i ask for that and luckily the wiring man do sell aircond oso so he quote me daikin inverter price with conceal piping and i think reasonable.....here my plaster ceiling quotation.....is a condo size 1100+sft

Item Descripton Qty Unit price Amount(rm)
1 PLASTER CEILING                                      855.20 2.50 2138.00
2 FAN HOLE & LIGHT HOLE(LABOUR CHARGES) 1.00 200.00 200.00
3 MANHOLE (ALUMINIUM)                                 3.00 55.00 165.00
4 LIGHT BOX                                                 1 300.00 300.00
5 L BOX FOR THE AIRCON                                 1 150.00 150.00
   
   
                                                      2953.00
not sure cheap or not la but i think reasonable kua.......
for wiring man quotation on aircond....

TO SUPPLY AND INSTALL 1.0HP AIR COND [WALL                               1450
MOUNTED]WITH COPPER PIPING,WATER PIPING,
HACKING,PLASTERING AND TERMINATION CABLE.
-1.0HP AIR COND INVERTER[WALL MOUNTED]

TO SUPPLY AND INSTALL 1.5HP AIR COND [WALL                                1750
MOUNTED]WITH COPPER PIPING,WATER PIPING,
HACKING,PLASTERING AND TERMINATION CABLE.
-1.5HP AIR COND INVERTER[WALL MOUNTED]
i think reasonable kua if including the conceal cos i check jintex electronic price for aircond cheaper but without installation....if installation add 150 if not mistaken....add up a bit cheaper than my wiring ppl but i dont think shop will do conceal lor......i think la....hahaha